TCP SYN (JA4T)

8192_2-1-3-1-1-4_1460_2

first seen 2026-08-21 17:13 · last seen 2026-09-04 16:19 · JSON

Distinct clients per day (last 30 days, peak 8/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

TCP window	`8192`
Option kinds	`2-1-3-1-1-4`
MSS	`1460`
Window scale	`2`

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprint	co-occurrences
`t13d2913h1_723694b0fccc_5671b5df5029`	16
`t13d1516h2_8daaf6152771_d8a2da3f94cd` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.	16
`t13d1515h1_8daaf6152771_0a20fe35d3a5`	3
`t13d1516h2_8daaf6152771_806a8c22fdea` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +24 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`t13d1515h1_8daaf6152771_de4a06bb82e3`	2

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nr16nlnl_94fdc06e0694_000000000000_000000000000`	6
`ge11nn14enus_4a2973d235de_000000000000_000000000000`	3
`ge11nr11enus_835281d8e5d9_000000000000_000000000000`	3
`ge20nn13enus_0c2c1d640f3e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +23 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge11nn11fifi_835281d8e5d9_000000000000_000000000000`	2
`ge11nr11fifi_835281d8e5d9_000000000000_000000000000`	2
`ge11nr11frfr_835281d8e5d9_000000000000_000000000000`	2
`ge20nr16ruru_94fdc06e0694_000000000000_000000000000`	2
`ge11nr11kokr_835281d8e5d9_000000000000_000000000000`	2
`ge11nr11engb_835281d8e5d9_000000000000_000000000000`	2

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.	18
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:220\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:112+16:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	7
`4:116+12:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	5
`4:108+20:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	4
`4:115+13:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	4
`4:107+21:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	4
`4:117+11:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	4
`4:111+17:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	3
`4:110+18:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	3
`4:41+23:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	2
`4:106+22:0:1460:8192,2:mss,nop,ws,nop,nop,sok:df,id+:0`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1`	4
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36`	3
`Mozilla/5.0 (iPhone; CPU iPhone OS 17_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Mobile/15E148 Safari/604.1`	3
`Mozilla/5.0 (Linux; Android 14; SM-S926B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36`	3
`Mozilla/5.0 (Linux; Android 12; SM-A536B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36`	3
`Mozilla/5.0 (Linux; Android 14; SM-S921B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36`	2
`Mozilla/5.0 (Linux; Android 12; Pixel 6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36`	2
`Mozilla/5.0 (Linux; Android 12; SM-S901B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36`	2
`Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.1`	2
`Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/150.0.0.0 Mobile/15E148 Safari/604.1`	2

Country

fingerprint	co-occurrences
`NL` · Netherlands	7
`UA` · Ukraine	5
`US` · United States	3
`KR` · South Korea	3
`FR` · France	3
`RU` · Russia	3
`AR` · Argentina	3
`VE` · Venezuela	3
`GB` · United Kingdom	2
`IT` · Italy	2

Network (ASN)

fingerprint	co-occurrences
`AS33915` · Vodafone Libertel B.V.	7
`AS25513` · PJSC Moscow city telephone network	3
`AS9318` · SK Broadband Co Ltd	3
`AS701` · Verizon Business	2
`AS5089` · Virgin Media Limited	2
`AS12322` · Free SAS	2
`AS30722` · Fastweb SpA	2
`AS27747` · Telecentro S.A.	2
`AS267809` · 360NET C.A.	2
`AS201776` · Miranda-Media Ltd	2